在ios中滚动视图控件

Question

I am new to iOS, Am facing an issue with UIScrollView . The scroll is not working in this, can you please help me:

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 310,300, 999)];

label.text = self.selString;
label.numberOfLines = 0;
// [self.view addSubview:label];

UIImageView *image = 
  [[UIImageView alloc] initWithFrame:CGRectMake(10, 20, 300, 300)];
image.backgroundColor = [UIColor greenColor];
image.tag = 50;
image.userInteractionEnabled=YES;
image.autoresizesSubviews = YES;
image.alpha = 0.93;
image.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://opensum.in/app_test_f1/45djx96.jpg"]]];   // working code
//[self.view addSubview:image];

self.title = @"Full Blog";

CGRect scrollViewFrame = CGRectMake(0,0, 320, 999);
scrollView = [[UIScrollView alloc] initWithFrame:scrollViewFrame];
scrollView.pagingEnabled =YES;
[self.view  addSubview:scrollView];

scrollView.tag=1000;


[scrollView addSubview:label];
[scrollView addSubview:image];

Answer 1

Set UIScrollView contentSize :

CGSize contentSize = CGSizeMake([[UIScreen mainScreen]bounds].size.width, 1000);
[scrollView setContentSize:contentSize];

Answer 2

You need to set the contentSize of your UIScrollView . Without setting that, it' won't show scrolling. And your contentSize should be bigger than your scrollView.frame.size .

Right now, your scrollView has a huge frame.height. Use a smaller value. And use the higher value for contentSize.height.

Answer 3

Try this code :

UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(10, 310,300, 999)];

label.text=self.selString;
label.numberOfLines=0;

UIImageView *image=[[UIImageView alloc]initWithFrame:CGRectMake(10, 20, 300, 300)];
image.backgroundColor = [UIColor greenColor];
image.tag = 50;
image.alpha = 0.93;
image.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://opensum.in/app_test_f1/45djx96.jpg"]]];

CGRect scrollViewFrame = CGRectMake(0,0, 320, 999);
scrollView = [[UIScrollView alloc] initWithFrame:scrollViewFrame];
scrollView.tag=1000;

[scrollView addSubview:image];
[scrollView addSubview:label];
[self.view  addSubview:scrollView];

scrollView.contentSize = CGSizeMake(self.view.frame.size.width, 999);// your scroll scroll height give here

Answer 4

像这样设置scrollview的内容高度

[scrollView setContentSize:(CGSizeMake(320, 999))];